FLOW PERMEABILITY OF FIBROUS POROUS MATERIALS. MICRO-TOMOGRAPHY AND NUMERICAL SIMULATIONS Viivi Koivu 1 , Maxime Decain 2,3 , Christian Geindreau 3 , Keijo Mattila 1 , Jarno Alaraudanjoki 1 , Jean-Francis Bloch 2 and Markku Kataja 1 1 University of Jyväskylä, Department of Physics, BO-Box 35, FI-40014 Jyväskylä, Finland 2 Papermaking Process Laboratory of Grenoble, 461 rue de la papeterie, BP65, 38402 St Martin D’Heres, France 3 Laboratory 3S-R, University of Grenoble-CNRS, Domaine Universitaire, BP53, 38041 Grenoble, Cedex 9 ABSTRACT In this work we demonstrate the use of computerized x-ray micro-tomography and numerical simulations in evaluating flow permeability of fibrous porous materials. This ab-initio approach involves solving fluid flow through material samples in the actual pore space obtained by tomographic techniques. The procedure is applied here in three different materials, namely plastic non- woven felt, newsprint and wet pressing felt. All numerical results presented are compared with experimental data for the same materials. The non-woven felt material, having a relatively simple structure, is first used as a test case for comparing two different numerical schemes, lattice-Boltzmann method and a finite- difference method. Here, values of both transverse and in-plane permeability are obtained. The transverse permeability of news- print and wet pressing felt under varying degree of compression is 14th Fundamental Research Symposium, Oxford, September 2009 437 Preferred citation: V. Koivu, M. Decain, C. Geindreau, K. Mattila, J. Alaraudanjoki, J.-F. Bloch and M. Kataja. Flow permeability of fibrous porous materials. Micro-tomography and numerical simulations. In Advances in Pulp and Paper Research, Oxford 2009, Trans. of the XIVth Fund. Res. Symp. Oxford, 2009, (S.J. I’Anson, ed.), pp 437–454, FRC, Manchester, 2018. DOI: 10.15376/frc.2009.1.437.
FLOW PERMEABILITY OF FIBROUS POROUS MATERIALS. MICRO-TOMOGRAPHY AND NUMERICAL SIMULATIONS
Jun 18, 2023
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